I am not going to weigh in on all the issues here, but I interned at Jason's studio long ago when his current interns were probably infants. You don't have to be an intern there to go visit the webpage for Holographic Studios and see things like this:
Look for the part about how many lasers you need. The technique can be as simple as something called a pre-swell of the emulsion and some selective exposures.
If you are reading this, check out his site and definitely watch the movie. Jason didn't get his body of work stretching over decades by nay-saying and giving up on things that seemed impossible to others. It is a good attitude for anything you do.